270 Thermometrk Tables, iS^c. 



3. Convert — 9.6 R. into degrees of Fahr. and Cent. : 

 _9 R. =+ 11.75 F. — 11.25 C. 

 —0.6 = — 1.35 — 6.75 



—9.6 R. = + 10.40 F. —12.00 C. 



If the proposed quantity extends to hundredths or thousandths 

 oF a degree, it may be converted by shifting the decimal point 

 of the proportional part either one or two places to the left. 

 For example : 



4. Convert 4- 52.246 C. into degrees of Fahr. and Reaum. : 

 + 52C. = 125.6 F. 41.6 R. 



+ 0.2 = 0.36 0.16 



+ 0.04 = 0.072 0.032 



+ 0.006 = 0.0108 0.0048 



+ 52.246 C. =1 26.0428 F. 41.7968 R. 



Barometeic Tables, Nos. IV. V. VI. 



1. Required the value in French inches and lines, and Eng- 

 lish inches, of a column of mercury 729.7 mill, in height. 

 By Table IV. 



Inch. Lin. 

 729 mill. = 26 11.16 French. 28.701 English inch. 

 + 0.7 = 0.315 0.0275 



729.7 = 26 11.475 28.7285 



Tables V. and VI. are used in the same manner, and serve 

 for the conversion of French inches and lines and English inches 

 into one another, and also into millimetres. By these tables a 

 conversion may be made at a half or third of any of the num- 

 bers, by doubling or trebling the given quantity, and then a 

 half or third of the result will be the quantity required. 



Tables VII. to XIV. 



Are for converting the different French and English measures 

 into one another, and are used in the same manner as the pre- 

 ceding. 



